public void RemoveItem_InvokeWithDictionary_Success()
{
var collection = new StringKeyedCollection <string>(null, 3);
collection.GetKeyForItemHandler = item => item + "_key";
collection.Add("first");
collection.Add("second");
collection.Add("third");
collection.Add("fourth");
Assert.NotNull(collection.Dictionary);
// Remove from start.
collection.RemoveItem(0);
Assert.Equal(new string[] { "second", "third", "fourth" }, collection.Items.Cast <string>());
Assert.Equal(new Dictionary <string, string>
{
{ "second_key", "second" },
{ "third_key", "third" },
{ "fourth_key", "fourth" }
}, collection.Dictionary
);
// Remove from middle.
collection.RemoveItem(1);
Assert.Equal(new string[] { "second", "fourth" }, collection.Items.Cast <string>());
Assert.Equal(new Dictionary <string, string>
{
{ "second_key", "second" },
{ "fourth_key", "fourth" }
}, collection.Dictionary
);
// Remove from end.
collection.RemoveItem(1);
Assert.Equal(new string[] { "second" }, collection.Items.Cast <string>());
Assert.Equal(new Dictionary <string, string>
{
{ "second_key", "second" }
}, collection.Dictionary
);
// Remove last.
collection.RemoveItem(0);
Assert.Empty(collection);
Assert.Empty(collection.Dictionary);
}
public void RemoveItem_InvokeWithoutDictionary_Success()
{
var collection = new StringKeyedCollection <string>(null, 3);
collection.GetKeyForItemHandler = item => item + "_key";
collection.Add("first");
Assert.Null(collection.Dictionary);
collection.RemoveItem(0);
Assert.Empty(collection);
Assert.Null(collection.Dictionary);
}
public void RemoveItem_NullKeyForItemResult_Success()
{
var collection = new StringKeyedCollection <int>(null, 3);
collection.GetKeyForItemHandler = item => item.ToString();
collection.Add(1);
collection.Add(2);
collection.Add(3);
collection.Add(4);
// Don't add/remove even numbers.
collection.GetKeyForItemHandler = item => item % 2 == 0 ? null : item.ToString();
// Remove null key.
collection.RemoveItem(1);
Assert.Equal(new int[] { 1, 3, 4 }, collection.Items.Cast <int>());
Assert.Equal(new Dictionary <string, int>
{
{ "1", 1 },
{ "2", 2 },
{ "3", 3 },
{ "4", 4 }
}, collection.Dictionary
);
// Remove non-null key.
collection.RemoveItem(0);
Assert.Equal(new int[] { 3, 4 }, collection.Items.Cast <int>());
Assert.Equal(new Dictionary <string, int>
{
{ "2", 2 },
{ "3", 3 },
{ "4", 4 }
}, collection.Dictionary
);
}
public void RemoveItem_DifferentKeyForItemResult_Success()
{
var collection = new StringKeyedCollection <int>();
collection.GetKeyForItemHandler = item => item.ToString();
collection.Add(1);
collection.Add(2);
collection.GetKeyForItemHandler = item => (item * 2).ToString();
collection.RemoveItem(1);
Assert.Equal(new int[] { 1 }, collection.Items.Cast <int>());
Assert.Equal(new Dictionary <string, int>
{
{ "1", 1 },
{ "2", 2 },
}, collection.Dictionary
);
}
public void RemoveItem_Invoke_ResetsCurrentThresholdCount()
{
var collection = new StringKeyedCollection <string>(null, 3);
collection.GetKeyForItemHandler = item => item + "_key";
collection.Add("first");
collection.RemoveItem(0);
// Add more items - make sure the current count has been reset.
collection.Add("first");
Assert.Null(collection.Dictionary);
collection.Add("second");
Assert.Null(collection.Dictionary);
collection.Add("third");
Assert.Null(collection.Dictionary);
collection.Add("fourth");
Assert.NotEmpty(collection.Dictionary);
}
public void RemoveItem_InvalidIndex_ThrowsArgumentOutOfRangeException(int index)
{
var collection = new StringKeyedCollection <string>(null, 3);
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => collection.RemoveItem(index));
}